<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
    @import url('https://fonts.googleapis.com/css?family=Montserrat:400,800');

    * {
        box-sizing: border-box;
    }

    body {
        background: #f6f5f7;
        display: flex;
        justify-content: center;
        align-items: center;
        flex-direction: column;
        font-family: 'Montserrat', sans-serif;
        height: 100vh;
        margin: -20px 0 50px;
    }

    h1 {
        font-weight: bold;
        margin: 0;
    }

    h2 {
        text-align: center;
    }

    p {
        font-size: 14px;
        font-weight: 100;
        line-height: 20px;
        letter-spacing: 0.5px;
        margin: 20px 0 30px;
    }

    span {
        font-size: 12px;
    }

    a {
        color: #333;
        font-size: 14px;
        text-decoration: none;
        margin: 15px 0;
    }

    button {
        border-radius: 20px;
        border: 1px solid #FF4B2B;
        background-color: #FF4B2B;
        color: #FFFFFF;
        font-size: 12px;
        font-weight: bold;
        padding: 12px 45px;
        letter-spacing: 1px;
        text-transform: uppercase;
        transition: transform 80ms ease-in;
    }

    button:active {
        transform: scale(0.95);
    }

    button:focus {
        outline: none;
    }

    button.ghost {
        background-color: transparent;
        border-color: #FFFFFF;
    }

    form {
        background-color: #FFFFFF;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-direction: column;
        padding: 0 50px;
        height: 100%;
        text-align: center;
    }

    input {
        background-color: #eee;
        border: none;
        padding: 12px 15px;
        margin: 8px 0;
        width: 100%;
    }

    .container {
        background-color: #fff;
        border-radius: 10px;
        box-shadow: 0 14px 28px rgba(0, 0, 0, 0.25),
            0 10px 10px rgba(0, 0, 0, 0.22);
        position: relative;
        overflow: hidden;
        width: 768px;
        max-width: 100%;
        min-height: 480px;
    }

    .form-container {
        position: absolute;
        top: 0;
        height: 100%;
        transition: all 0.6s ease-in-out;
    }

    .sign-in-container {
        left: 0;
        width: 50%;
        z-index: 2;
    }

    .container.right-panel-active .sign-in-container {
        transform: translateX(100%);
    }

    .sign-up-container {
        left: 0;
        width: 50%;
        opacity: 0;
        z-index: 1;
    }

    .container.right-panel-active .sign-up-container {
        transform: translateX(100%);
        opacity: 1;
        z-index: 5;
        animation: show 0.6s;
    }

    @keyframes show {

        0%,
        49.99% {
            opacity: 0;
            z-index: 1;
        }

        50%,
        100% {
            opacity: 1;
            z-index: 5;
        }
    }

    .overlay-container {
        position: absolute;
        top: 0;
        left: 50%;
        width: 50%;
        height: 100%;
        overflow: hidden;
        transition: transform 0.6s ease-in-out;
        z-index: 100;
    }

    .container.right-panel-active .overlay-container {
        transform: translateX(-100%);
    }

    .overlay {
        background: #FF416C;
        background: -webkit-linear-gradient(to right, #FF4B2B, #FF416C);
        background: linear-gradient(to right, #FF4B2B, #FF416C);
        background-repeat: no-repeat;
        background-size: cover;
        background-position: 0 0;
        color: #FFFFFF;
        position: relative;
        left: -100%;
        height: 100%;
        width: 200%;
        transform: translateX(0);
        transition: transform 0.6s ease-in-out;
    }

    .container.right-panel-active .overlay {
        transform: translateX(50%);
    }

    .overlay-panel {
        position: absolute;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-direction: column;
        padding: 0 40px;
        text-align: center;
        top: 0;
        height: 100%;
        width: 50%;
        transform: translateX(0);
        transition: transform 0.6s ease-in-out;
    }

    .overlay-left {
        transform: translateX(-20%);
    }

    .container.right-panel-active .overlay-left {
        transform: translateX(0);
    }

    .overlay-right {
        right: 0;
        transform: translateX(0);
    }

    .container.right-panel-active .overlay-right {
        transform: translateX(20%);
    }


</style>

<body>
    <h2>Weekly Coding Challenge #1: Sign in/up Form</h2>
    <div class="container" id="container">
        <div class="form-container sign-up-container">
            <form action="#">
                <h1>Create Account</h1>
                <span>or use your email for registration</span>
                <input type="text" placeholder="Name" />
                <input type="email" placeholder="Email" />
                <input type="password" placeholder="Password" />
                <button>Sign Up</button>
            </form>
        </div>
        <div class="form-container sign-in-container">
            <form action="#">
                <h1>Sign in</h1>
                <span>or use your account</span>
                <input type="email" placeholder="Email" />
                <input type="password" placeholder="Password" />
                <a href="#">Forgot your password?</a>
                <button>Sign In</button>
            </form>
        </div>
        <div class="overlay-container">
            <div class="overlay">
                <div class="overlay-panel overlay-left">
                    <h1>欢迎!</h1>
                    <p>To keep connected with us please login with your personal info</p>
                    <button class="ghost" id="signIn">去登录-></button>
                </div>
                <div class="overlay-panel overlay-right">
                    <h1>你好,朋友!</h1>
                    <p>Enter your personal details and start journey with us</p>
                    <button class="ghost" id="signUp">去注册-></button>
                </div>
            </div>
        </div>
    </div>
</body>
<script>
    const signUpButton = document.getElementById('signUp');
    const signInButton = document.getElementById('signIn');
    const container = document.getElementById('container');

    signUpButton.addEventListener('click', () => {
        container.classList.add("right-panel-active");
    });

    signInButton.addEventListener('click', () => {
        container.classList.remove("right-panel-active");
    });
</script>

</html>